Guerrilla vs Gorilla

On the train home I was pondering the difference between guerrilla marketing and gorilla marketing.

Antonio points out that the Cadbury's Phil Collins advert might be an example of gorilla marketing, but I think it's probably deeper than that.

According to Wikpedia:

Guerrilla marketing is an unconventional system of promotions that relies on time, energy and imagination rather than a big marketing budget. Typically, guerrilla marketing tactics are unexpected and unconventional; consumers are targeted in unexpected places, which can make the idea that's being marketed memorable, generate buzz, and even spread virally.

In comparison, gorilla marketing is probably all about alpha males beating their chests and flinging faeces.

I know which type of marketing I'd rather use.